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slavikrds [6]
3 years ago
11

Use the drop-down menus to match each description to the geologic era it describes.

Biology
2 answers:
max2010maxim [7]3 years ago
8 0

Answer:

Mesozoic era

Explanation:

The mesozoic is but one of the eras on the geologic timescale. This era spanned between 252 - 66million years ago.

It is bounded by two major mass extinction events. The Permian- Triassic extinction wiped about 90% of a life on earth. The other extinction is the Cretaceous-Paleogene which resulted in the demise of the dinosaurs.

During the mesozoic, the continents also formed from pangea and they all drifted to their present day position.

There are 3 periods in the mesozoic era:

Triassic - Jurassic - Cretaceous.

The mesozoic is known as the age of reptiles and dinosaurs.

The first flowering plants came towards the end of the era. The era was intially dominated by conifers.

This is also the age of the first birds.

Elden [556K]3 years ago
8 0

1) Mesozoic

2) Cenozoic

3) Paleozoic

2020 on edge

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A. Neurotransmitters can act as ligands.

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Explanation:

Answer:

A. Neurotransmitters can act as ligands.

B. Acetylcholine is a neurotransmitter. It can bind to an acetylcholine receptor on the surface of a cell. If this receptor is also a sodium channel, we would call acteylcholine a ligand and its receptor a ligand gated receptor.

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Neurotransmitter are chemicals that transfer signals between neurons and nerve cells. They control some physical and physiologocal activity such as appetite, food.

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Can anyone help me in this question!!!
MissTica

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